Device for reciprocating pump rods



March 18, 1947. P. HEIMAN 2,417,411.

DEVICE FOR RECIPROCATING PUMP RODS Filed Feb. 12, 1945 3 Sheets-Sheet 1 I Fla-2L Lows? HEIMAN ATTORNEY March 18, 1947.

1..P. HEIMAN DEVICE FOR RECIPROCATING PUMP RODS Filed Feb. 12, 1945 3 Sheets-Sheet 2 R O T N E V N I LOUISPHEIMAN @464. 17 ATTORNEY Patented Mar. 18, 1947 UNITED STATES PATENT orrlcs DEVICE FOR RECIPROCATING PUMP RODS Louis P. Holman, St. Paul, Minn.

I Application February 12, 1945, Serial No. 577,471

18 Claims.

This invention relates to a driving means for a reciprocating member such as a reciprocating member for operating a pump rod.

It is an object of this invention to provide a simple, efficient and compact means for moving .a reciprocating member in opposite directions.

lating members for moving the latter in reversedirection to said second rotatable member. to-

gether with means carried by the other oscillating member and said second rotatable member adapted to be moved into driving relation with said driven rotatable member and cam means for moving said last mentioned members.

It is still another object of the invention to provide a mechanism for operating a reciprocating member comprising a pair of oscillating or rotating members connected respectively to said reciprocating member for operating the latter, a constantly driven rotatable member adjacent one of said oscillating members, a second rotatable member adjacent said driven rotatable member, means connecting said second rotatable member to the other of said oscillating members for driving the latter in reverse direction to said second rotatable member, said driven rotatable member having driving means at opposite sides thereof, members carried respectively in said one oscillating member and said second rotatable member adapted to be moved alternately into driving relation with said driving means on said driven rotatable member and stationary cams at the remote sides of said one oscillating member and said second rotatable member for moving said last mentioned members to alternately connect said one oscillating member and said'second rotatable member to said driven rotatable member.

It is still further an object of the invention to provide such a mechanism as set forth in the preceding paragraph, said driven rotatable member having a member carried therein and movable transversely thereof adapted to alternately engage and move said members carried in 1 comprising a base said one oscillating member and said second ro-' tatable member and being moved by cams carried respectively on said one oscillating member and said second rotatable member for disconnecting the same from said driven rotatable member.

These and other objects and advantages of the invention will be fully set forth in the following description made in connection with the accompanying drawings in which like reference characters refer to similar parts throughout the several views and in which: I

Fig. l is a vertical section taken substantially on line l-l of Fig. 2, as indicated by the arrows;

Fig. 2 is a View partly in side elevation and partly in vertical section taken on line 2-2 of Fig. 1, as indicated by the arrows;

Fig. 3 is a partial vertical section taken on line 2--2 of Fig. 1, as indicated by the arrows; with parts in different position;

Fig. 4 is a horizontal section taken substantially on line l4 of Fig. 1; as indicated by the arrows;

Fig. 5 is a view similar to Fig. 4 showing some of the parts in different positions;

Fig. 6 is a view similar to Fig. 4 showing some of the parts in still other positions;

Fig. '7 is a partial viewin side elevation as seen from the left of Fig. 1.

Fig. 8 is a vertical section taken on line 8-8 of Fig. 5, as indicated by the arrows; and

Fig. 9 is a vertical section taken on line 9-9 of Fig. 5, as indicated by the arrows.

Referring to the drawings, a structure is shown member [5 to one end of which are secured by headed bolts [6 a plurality of gaging side said cross-head has bolted thereto by headed clamps and connects 28. Member 26 is clamped to member cent one end of said groove 28a by a U-bolt 21 brackets I1. Brackets ll engage and support vertically extending oppositely disposed channel members l8 between which is guided for movement a cross-head 19. A pump rod 29 is secured .in cross-head Hi, the samehaving a nut 2| threadedthereon engaging the lower side of said crosshead and having a nut 22 threaded thereon enthe other side of said cross-head. At one bolts 24 a clampingplate 25. Clamping plate 25 to cross-head IS a flexible member orcable ZS'illustrated as disposed in and moving in the peripheral groove 23a. of an oscillatable or rotatable segmental pulley or sheave 28 adiapassing through lugs 23b and equipped with nuts 29. Plate 25 also clamps and connects to crosshead l9 another flexible member or cable 3l illus ofgear '3.

trated as adapted to be disposed in and movable in a peripheral groove 32a of a second segmental pulley or sheave 32. Member 31 is secured adjacent one end to member 32 adjacent one end of groove 32a by a U-bolt 33 passing through lugs 32b and equipped with nuts 35. Member 28 is secured to a shaft 38 in any suitable manner as by a key 39 and set screw 43. Shaft 33 is journaled inbearing. hubs. 45a andv Ma. carried respectively on plates or brackets 45; and 4| which extend vertically from and are connected to and shown as integral with base plate [5. Brackets. 46 are riveted to base l5 and have vertical flanges 46a riveted to plates 45 and 3-1 respectively. Pulley or member 32 is revoluble on a-shaft 44 carried in bearing hubs 40b and M6 formed on plates 43 and M respectively. Shaft-'45: is held? stationary in any suitable manner as by pins or screws 45 extending through hubs 45b and 41b thereinto.

Spaced brackets 41' are secured to' base member l5 by headed screws or bolts 4'8 and a shaft 49 is journaled in said brackets. Shaft 59 is shown as extending to one side of one of said brackets 41 and'will'be connected to some suitable driving means or motor. Secured to shaft between brackets 41' is a worm gear 55.; Worm gear 50 meshes with a worm wheel gear 52 which is'revoluble on shaft 43. A'second gear 532 shown as a spur gear, is journaled on shaft 44 and meshes with another spur gear 5 1 secured to a shaft 55 journaled in a bearing hub' we carried on bracket 40; Shaft 56 is held from longitudinal movement in one direction by a collar'57 secured thereto in any suitable manner as by'a set screw 55. Shaft 56 has secured thereto at one sideof gear 54 and is held from long t dinal movement in one direction by a sprocket 63. Sprocket 65 is secured toshaft 56 inany suitablemanner as by suitable manner as by a set screw 64 As shown in Fig. 1, sprocket 53 has a hub, one of the ends of which engages the hub of member or sheave 28 and the other end ofwhich engages hub 40a. With the d scribed construction it will' be seen that shaft 38 will be driven by cha n 62 and gear 54in a reverse direction to the rotation of gear 53.

The driven rotatable member or worm wheel gear 52 has lugs 52a and 52b projecting from opposite sides thereof respectively and these lugs are adapted to engage a member or key 63 disposed in a slot ingear 53 and movable therein transversely of'gear 53. The oscillating member or sheave 42 also has carried therein a member or key 61' slidable in a slot extending transversely of said' sheave and adapted to be moved into position to be engaged by 111.9; 52a. The driven worm wheel gear 52 alsohas therein a member or key fifi slidable in a slot extending transversely thereof. The frame members 43' and 41 areapertured' to have inserted therein respectively cam plates 45c and Me which are held in place by headed bolts lll'threaded' into flangeson plates 45c. and 410, which. flanges are disposed. at the inner sides of plates 45' and ll. The cam plate me has av cam. Mid thereon adapted to be engagedl by and'to move the key 6.5 in the rotation Cam; platellllc. has. a cam lidthereon adapted tobe. engaged by and-to..move the key 6 inthe. rotation of member or sheave 32. The gear-.53 also carries thereon a. cam 53a adapted to engage and. move key 38. in the rotation of gear 53.. Themember or. sheave32also cantiesa vmoved downward. moving cross-head 4 i a cam 3217 on the hub thereof which is adapted at times to engage and move key 68.

In operation shaft 49 will be driven by a motor or other suitable driving means and worm gear 50 will thus be driven to rotate the worm wheel gear 52. Gear 52 will thus be constantly driven in one direction. As gear 52 rotates, the key 56 65 is thus moved, gear 53 is moving in the direction indicated by the arrow adjacent the same in Fig. 4. J ustt after. key 66 is moved to said position and before it is engaged by lug 55a, the cam 53a on gear 53 engages the key 58 in gear 52 and moves the same away from gear 53. When key 68 is. so. moved, its is in alinementi' with key 61 and as key 53; is thus? moved. away from: gear: 53,

key 5? is also moved and-is moved toward cam plate M0 or downward, as shown. in. Figs. 4, 5 and 6. The driven gear 52. now drives gear 53 and. the same is disconnected from sheave 32. Gear 53' being rotated, sprocket 35 is rotated, movingchain 6'2 and rotating sprocket 63, shaft 35 and sheave; 28-. Sheave 2-8 is rotated in. a clockwise direction, as seen in Fig. 2, and it winds; up cable 25- thereon, thus raising crosshead. It and: pump-rod 25.. When. sheave. 23 is thus rotating in-a clockwise direction, sheave32 is disconnected from gear'52 and is moved by cable 3| to the position shown in Fig. 2, the same moving idly on shaft 43.. Just before. sheave23 reaches the position shown in, Fig. 2; the cam 32b on sheave 32- engages key 38' in gear 52 and moves it toward gear 5.3-; Key 68. at this time is in. alinement with key 65 and key 65 is moved or pushed. by. the. key 38 to, the position. shown inzFig. 5. Key Eli-is thus. not in driving relation with lug 52b and; the driving of gear 53. is discontinued; Just before. keys 58- and' 65 are moved to the position shown in Fig. 5, key 67 engages cam lid on cam plate ilc andv is moved by said cam intothe position shown in Figs. 5 and 6. Key 65' is. now in alinement with lug 52a and is in driving relation to gear 52: and sheave 32v will now be driven by gear 52. Sheave 32:. will be drivenin: a counter-clockwise direction and cable 3.!- will' be wound onsheave 32 and willthus be 59. and pumprod 20- downward; Whensheave 32. is thus being driven, gear 53., as stated, is disconnected from gear 52 and sheave 28, sprocket 63, chain 62, gear 53- and gear 53 will be rotated by cable 26, rotating sheave 28. Gear 53 will turn idly on shaft 44 When sheave 32 has made substantially a half revolution, the cam 53a on gear 5.3 will engage. key 68 and will move the s me way from; gear. 53.. Key 38 at this: time is in alinementiwithkey 6.1,, as. shown: in Fig. 6,,and. key 6.1 will be. pushed. away from gear 52 and will be moved out. of alinement. with lug- 52a. Just be,- fore. key 31 thus. moved, the. key 55 will, be engaged by cam 43d. on cam plate 55c and will again. be. moved to the position shown in Fig. 4. Sheave. 32 is now disconnected from gear 52 and the. gear 53: is-v again. connected to gear 52. The sheave 28 will again bemoved. as above described and will pull cable 25, cross-head. l3 and pump rod !8. upwardly. It will be seen that the cam did on. cam plate ilo. is disposed substantially degrees from. the. cam, 43d carried. on. cam

. plate 400.

reciprocating motion The cam 3212 when in operative position to engage key 68 is somewhat separated circumferentially from cam Md. The key 68 is thus moved just after the key 6'! or the key 66 is moved into driving position. The cam 53a is thus also somewhat spaced circumferentially from cam lild when it is acting on key 68, as shown in Fig. 9. Key 56 is thus moved out of driving relation to gear 52 just after key 61 is moved into driving relation with gear 52, but before lug 52a engages key 91. Vice versa key 61 is moved out of driving position relative to gear 52 just after key 65 is moved into driving relation but before lug 52a engages key 66. In Fig. 5 key 8? has just been moved into driving position and cam 32b is just finishing its movement of keys 68 and G6 to disconnect gear 53. In Fig. 4 key 5'! is just being moved by cam Md into driving position but cam 3% has not yet reached key 68 to move it and key 66 to disconnect gear 53. Key 68 will complete the movement of key 56 just before lug 52a engages key 6? to drive sheave 32. As gear rotates in a counter-clockwise direction in its idling cycle, key 66 first engages cam 40d and is moved into driving position. Shortly afterward, as can be seen in Fig. 9, cam 53a will move keys E8 and 61 and disconnect sheave 32 just before lug 53a engages key 6% to pick up and drive gear 53. It will thus be seen that the sheaves 23 and 32 are alternately driven or oscillated in opposite directions to move the cross-head l9 and pump rod 20.

From the above description it will be seen that I have provided quite a simple, rugged and very eflicient driving means for reciprocating a member such as a pump rod. The reversal of the reciprocating members is accomplished easily and smoothly. The device when used to reciprocate a pump rod is of particular utility in deep well pumps or pumps used in mines. In certain deep well pumps the water is raised through several cylinders. When the pump rod moves upward water is lifted on such rip-stroke to an upper cylinder and it is discharged from the upper cylinder on the down-stroke. Both strokes thus require power and the present mechanism drives with as much power in one direction as in the other, The amplitude of reciprocation can be varied by varying the radius of the oscillating sheaves. The circumferential movement of the sheaves can also be varied by varying the disposition of the cams. The power is evenly applied over the entire travel in both directions and a smooth operation of the pump rod is thus secured. A long stroke can be had on the pump rod which will eliminate cylinder wear and give longer life to packing, valves, etc. The direct straight line pull also eliminates bending stresses in the pump rod. Crank pins, connecting rods and the necessary bearings commonly used in pump operating reversing mechanisms are eliminated. The reciprocated motion could be applied to various machines such as saws, slotters, shapers, planers, grinders, hoists and elevators. Obviously it could be used to translate rotary into in various applications. The reciprocating motion obtained i of constant speed and the reversal is accomplished without any jerky effect. The stroke in one direction could be made of a different speed than the stroke in the opposite direction by varying the ratio of the sprockets over which the chain runs. The device has been amply demonstrated in actual practice and found to be very successful and efficient.

It will, of course, be understood that various changes may be made in the form, details, arrangement and proportions of the parts, without departing from the scope of applicants invention, which generally stated, consists in a device capable of carrying out the objects above 'set forth, in the parts and combinations of parts necting said second rotating member and said first mentioned oscillating member to cause the latter to move in reverse direction to said second rotatable member, means carried by said second oscillating member and said second rotatable member adapted to be moved alternately respectively into engaging relation with said driving means, and cam members for moving said last mentioned means to alternately connect said second mentioned oscillating member and said second rotatable member to said driven rotatable member.

2. The structure set forth in claim 1, and means carried in said driven rotatable member for moving said third mentioned means.

3. A pump operating mechanism having in combination, a vertically reciprocating pump element, an oscillating member connected to said element for moving it in one direction, a second oscillating member connected to said element for moving it in the opposite direction, a driven rotating member having driving means thereon, a second rotatable member adjacent said driven rotatable member at the side thereof opposite said second oscillating member, means connecting said second rotating member and said first mentioned oscillating member for rotating the latter in reverse direction to said second rotating member, said driven rotatable member having driving means at opposite sides thereof, members carried in said second mentioned oscillating member and said second rotatable member respectively adapted to be alternately moved into position to be engaged by the driving means at one side of said driven rotatable member, and cam means for moving said last mentioned members to alternately connect said second oscillating member and said second rotatable member to said driven rotatable member.

4. The structure set forth in claim 3 and a member carried in said driven rotatable mem-- her and movable transversely thereof adapted to cooperate with said last mentioned members to move the latter, and cam means for moving said last mentioned member.

5. A pump operating mechanism having in combination, a vertically reciprocating pump element, an oscillating member connected to said element for moving it in one direction, a second oscillating member connected to said element for moving it in the opposite direction, a driven rotating member having driving means thereon, a second rotatable member at one side of said driven rotatable member adjacent said second oscillating member, a second rotatable member adjacent said driven rotatable member at the side thereof opposite said second oscillat- :ing member, means; connecting said second rotating member and said first mentioned oscillating member for rotating the latter in reverse direction to said second mentioned rotating member, said. driven rotatable member having driving means at opposite sides thereof, members carried in said second mentioned oscillating member and said second rotatable member respectively adapted to be alternately moved into position to be engaged bythe driving means at one side. of said driven rotatable member, sta- ,tionary cam. means. at the sides respectively of said second. mentioned oscillating member and said second rotatable member remote from said driven rotatable member for alternately moving saidilast; mentioned members respectively to bring the same into driving relation with said driving means on said driven rotatable member to alternately drive said second mentioned oscillating member and said. second rotatable member.

6. The. structure set. forth in claim a member carried in said driven: rotatable member and movable transversely thereof adapted to engage said last mentioned. members respectively to move the same out of driving relation to said driving means on said driven rotatable member and cam means. carried respectively on said second mentioned oscillating member and second rotatable member for moving said last mentioned member.

7. A device of the class described, having in combination, a. vertically reciprocating element, an oscillating; member connected to said element for moving it, in: one direction, a second oscillating member connected to said element for moving it in the opposite direction, a driven rotatable member adjacent said second oscillating member and having lugs projecting at opposite sides thereof, a second rotatable member adjacent said driven rotatable member, means con necting said second rotatable member and said first. mentioned oscillating member for rotating the latter in reverse direction to said second mentioned rotatable member, keys carried in said second mentioned oscillating member and said second rotatable member respectively extending transversely thereof and. adapted to be moved alternately into position to be engaged by said lugs respectively, stationary cam means at the sides respectively of said second mentioned oscillating member and said second rotatable member for alternately moving said keys respectively to bring the same into driving relation with said lugs to alternately drive said second mentioned oscillating member and said second rotatable member.

8. The structure set. forth in claim 7, a key carried in said driven rotatable member and movable transversely thereof adapted to engage said keys respectively to alternately mOVe the same out of driving relation with said lugs and cam means carried, respectively on said second mentioned oscillating member and said second rotating member for engaging and moving said last mentioned key.

9. A. device of the class described having in combination, a reciprocating element, an oscillating member: connected to. said element for moving it in one direction, a second oscillating member connected to said element for moving it in the opposite direction, a, driven rotatable member adjacent said second oscillating member and having driving means. at opposite sides thereof,

a second rotatable member adjacent said driven rotatable member, said second. oscillating memben. said. driven. rotatable member and said sec- 0nd rotatable. member. being journaled on a shaft, means. connecting said second rotatable member and said: first mentioned oscillatingmemberto cause the latter to move in reverse direction to said second rotatable member, means carried by said second oscillating member and said second rotatable member adapted to be moved alternate ly respectively into engaging relation with said driving means and cam members forrnoving said last mentioned means. to alternately connect said second; mentioned oscillating member and said second rotatable member to said driven rotatable member.

10. The structure set forth in claimv 9, sai'dsec- 0nd rotatable member constituting a gear, .a gear meshing with said gear, a sprocketconnected. to said last mentioned gear, a sprocket connected to said first mentioned oscillating, member and. a chain running over said sprockets.

11. A. device of the class described having in combination, a reciprocating element,.an oscillating'member connected to said element for moving it in one direction, a second oscillating member connected to said element for moving it in the opposite direction, a driven rotating member having driving means at opposite sides thereof, said second oscillatin member being disposed. at one side or" and adjacent said driven rotating member, a second rotatable member at the opposite side of and adjacent said driven rotatable member, means connecting said second rota-table member and said first mentioned oscillating member to cause the latter to move in reverse direction to said second rotatable member, movable-means. for alternately connecting said second rotatable memb r and said second oscillating member to cable moving adjacent and parallel to the line of movement of said element, a second oscillatable sheave, a second cable secured to said second sheave and to said element; and means. for rotating said second sheave alternately with the movement of said first mentioned sheaveand in a di. rection opposite to that of said first mentioned sheave to move said element in the opposite direction, said second cable moving adjacent and parallel to the line of movement ofsaid element.

14. The structure set forth in claim 13, said last mentioned means comprising a driven member, and means for alternately connecting said sheaves to said member.

15. The structure set forth. in claim 13, a: driven member rotating constantly in one direction, a gear at one side of said member, one. of. said sheaves being at. the opposite, side of said mem: ber, means connecting said gear to the other of said sheaves and cam operated means for alter.- nately connectirr said gear to said driven member and for connecting said lastmentioned sheave to said driven member.

16. A device of the class described having; in combination, a shaft, a driving gear secured. to said shaft, an oscillating sheave journaled. on said shaft at one side of said gear, a reciprocating member, means connecting said sheave to said member to move said member in one direction, a second gear journaled on said shaft at the opposite side of said driving gear, means for alternately connecting said sheave and gear to said driving gear, a second shaft, a third gear onsaid second shaft and meshing With said second gear, a third shaft, asecond oscillating sheave secured to said third shaft, means connecting said second sheave to said reciprocating member to move it in a direction opposite to said direction, sprock ets on said second and third shafts and a chain running over said sprockets.

1'7. The structure set forth in claim 16, said first mentioned means comprising a cable secured to said first mentioned sheave and adapted to be Wound thereon, said cable being also secured to said reciprocating member and said last mentioned means comprising a cable secured to said second sheave and adapted to be Wound thereon and also secured to said reciprocating member,

18. A device of the class described having in combination, a shaft, a driving gear secured to said shaft, an oscillating sheave journaled on said REFERENCES SITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 195,508 Hurley et a1. Sept. 25, 1877 359,167 Tallerday Mar. 8, 1387 444,309 Welivar Jan. 6, 1891 431,442 Cook July 1, 1890 

